Merge pull request #118 from JadeShrineMaiden/moblocomotion

Greased up enemies

src/ItemManager.cpp

@@ -123,6 +123,9 @@ void ItemManager::itemMoveHandler(CNSocket* sock, CNPacketData* data) {
 
         // send equip event to other players
         PlayerManager::sendToViewable(sock, (void*)&equipChange, P_FE2CL_PC_EQUIP_CHANGE, sizeof(sP_FE2CL_PC_EQUIP_CHANGE));
+        
+        // set equipment stats serverside
+        setItemStats(plr.plr);
     }
 
     // send response
@@ -859,3 +862,19 @@ void ItemManager::checkItemExpire(CNSocket* sock, Player* player) {
     player->toRemoveVehicle.eIL = 0;
     player->toRemoveVehicle.iSlotNum = 0;
 }
+
+void ItemManager::setItemStats(Player* plr) {
+
+    plr->pointDamage = 8 + plr->level * 2;
+    plr->groupDamage = 8 + plr->level * 2;
+    plr->defense = 16 + plr->level * 4;
+
+    Item* itemStatsDat;
+
+    for (int i = 0; i < 4; i++) {
+        itemStatsDat = ItemManager::getItemData(plr->Equip[i].iID, plr->Equip[i].iType);
+        plr->pointDamage += itemStatsDat->pointDamage;
+        plr->groupDamage += itemStatsDat->groupDamage;
+        plr->defense += itemStatsDat->defense;
+    }
+} 

src/ItemManager.hpp

@@ -5,7 +5,7 @@
 
 struct Item {
     bool tradeable, sellable;
-    int buyPrice, sellPrice, stackSize, level, rarity; // TODO: implement more as needed
+    int buyPrice, sellPrice, stackSize, level, rarity, pointDamage, groupDamage, defense; // TODO: implement more as needed
 };
 struct VendorListing {
     int sort, type, iID;
@@ -49,4 +49,5 @@ namespace ItemManager {
     int findFreeSlot(Player *plr);
     Item* getItemData(int32_t id, int32_t type);
     void checkItemExpire(CNSocket* sock, Player* player);
+    void setItemStats(Player* plr);
 }

src/MobManager.cpp

@@ -7,6 +7,13 @@
 #include <cmath>
 #include <assert.h>
 
+#ifndef MIN
+# define MIN(A,B) ((A)<(B)?(A):(B))
+#endif
+#ifndef MAX
+# define MAX(A,B) ((A)>(B)?(A):(B))
+#endif
+
 std::map<int32_t, Mob*> MobManager::Mobs;
 
 void MobManager::init() {
@@ -61,12 +68,19 @@ void MobManager::pcAttackNpcs(CNSocket *sock, CNPacketData *data) {
         }
         Mob *mob = Mobs[pktdata[i]];
 
-        int damage = hitMob(sock, mob, 150);
+        std::pair<int,int> damage;
+
+        if (pkt->iNPCCnt > 1)
+            damage = getDamage(plr->groupDamage, (int)mob->data["m_iProtection"], true, (int)mob->data["m_iNpcLevel"]);
+        else
+            damage = getDamage(plr->pointDamage, (int)mob->data["m_iProtection"], true, (int)mob->data["m_iNpcLevel"]);
+
+        damage.first = hitMob(sock, mob, damage.first);
 
         respdata[i].iID = mob->appearanceData.iNPC_ID;
-        respdata[i].iDamage = damage;
+        respdata[i].iDamage = damage.first;
         respdata[i].iHP = mob->appearanceData.iHP;
-        respdata[i].iHitFlag = 2; // hitscan, not a rocket or a grenade
+        respdata[i].iHitFlag = damage.second; // hitscan, not a rocket or a grenade
     }
 
     resp->iBatteryW = plr->batteryW;
@@ -94,15 +108,16 @@ void MobManager::npcAttackPc(Mob *mob) {
     sP_FE2CL_NPC_ATTACK_PCs *pkt = (sP_FE2CL_NPC_ATTACK_PCs*)respbuf;
     sAttackResult *atk = (sAttackResult*)(respbuf + sizeof(sP_FE2CL_NPC_ATTACK_PCs));
 
-    plr->HP += (int)mob->data["m_iPower"]; // already negative
+    auto damage = getDamage(440 + (int)mob->data["m_iPower"], plr->defense, false, 36 - (int)mob->data["m_iNpcLevel"]);
+    plr->HP -= damage.first;
 
     pkt->iNPC_ID = mob->appearanceData.iNPC_ID;
     pkt->iPCCnt = 1;
 
     atk->iID = plr->iID;
-    atk->iDamage = -(int)mob->data["m_iPower"];
+    atk->iDamage = damage.first;
     atk->iHP = plr->HP;
-    atk->iHitFlag = 2;
+    atk->iHitFlag = damage.second;
 
     mob->target->sendPacket((void*)respbuf, P_FE2CL_NPC_ATTACK_PCs, resplen);
     PlayerManager::sendToViewable(mob->target, (void*)respbuf, P_FE2CL_NPC_ATTACK_PCs, resplen);
@@ -275,7 +290,7 @@ void MobManager::combatStep(Mob *mob, time_t currTime) {
         // movement logic
         if (mob->nextMovement != 0 && currTime < mob->nextMovement)
             return;
-        mob->nextMovement = currTime + (int)mob->data["m_iDelayTime"] * 100;
+        mob->nextMovement = currTime + 500;
 
         int speed = mob->data["m_iRunSpeed"];
 
@@ -384,6 +399,11 @@ void MobManager::roamingStep(Mob *mob, time_t currTime) {
 
 void MobManager::retreatStep(Mob *mob, time_t currTime) {
     // distance between spawn point and current location
+    if (mob->nextMovement != 0 && currTime < mob->nextMovement)
+        return;
+
+    mob->nextMovement = currTime + 500;
+    
     int distance = hypot(mob->appearanceData.iX - mob->spawnX, mob->appearanceData.iY - mob->spawnY);
 
     if (distance > mob->data["m_iIdleRange"]) {
@@ -456,13 +476,21 @@ void MobManager::step(CNServer *serv, time_t currTime) {
 std::pair<int,int> MobManager::lerp(int x1, int y1, int x2, int y2, int speed) {
     std::pair<int,int> ret = {};
 
+    speed /= 2;
     int distance = hypot(x1 - x2, y1 - y2);
+
+    if (distance > speed) {
         int lerps = distance / speed;
 
         // interpolate only the first point
-    float frac = 1.0f / (lerps+1);
-    ret.first = (x1 * (1.0f - frac)) + (x2 * frac);
-    ret.second = (y1 * (1.0f - frac)) + (y2 * frac);
+        float frac = 1.0f / (lerps);     
+
+        ret.first = (x1 + (x2 - x1) * frac);
+        ret.second = (y1 + (y2 - y1) * frac);
+    } else {
+        ret.first = x2;
+        ret.second = y2;
+    }
 
     return ret;
 }
@@ -572,3 +600,19 @@ void MobManager::playerTick(CNServer *serv, time_t currTime) {
     if (currTime - lastHealTime < 4000)
         lastHealTime = currTime;
 }
+
+std::pair<int,int> MobManager::getDamage(int attackPower, int defensePower, bool shouldCrit, int crutchLevel) {
+
+    std::pair<int,int> ret = {};
+
+    int damage = (MAX(40, attackPower - defensePower) * (34 + crutchLevel) + MIN(attackPower, attackPower * attackPower / defensePower) * (36 - crutchLevel)) / 70;
+    ret.first = damage * (rand() % 40 + 80) / 100; // 20% variance
+    ret.second = 1;
+
+    if (shouldCrit && rand() % 20 == 0) {
+        ret.first *= 2; // critical hit
+        ret.second = 2;
+    }
+
+    return ret;
+}

src/MobManager.hpp

@@ -104,4 +104,5 @@ namespace MobManager {
     void killMob(CNSocket *sock, Mob *mob);
     void giveReward(CNSocket *sock);
     std::pair<int,int> lerp(int, int, int, int, int);
+    std::pair<int,int> getDamage(int, int, bool, int);
 }

src/Player.hpp

@@ -47,6 +47,10 @@ struct Player {
     bool inCombat;
     bool dotDamage;
     
+    int pointDamage;
+    int groupDamage;
+    int defense;
+
     int64_t aQuestFlag[16];
     int tasks[ACTIVE_MISSION_COUNT];
     int RemainingNPCCount[ACTIVE_MISSION_COUNT][3];

src/PlayerManager.cpp

@@ -322,6 +322,9 @@ void PlayerManager::enterPlayer(CNSocket* sock, CNPacketData* data) {
     addPlayer(sock, plr);
     //check if there is an expiring vehicle
     ItemManager::checkItemExpire(sock, getPlayer(sock));
+    
+    //set player equip stats
+    ItemManager::setItemStats(getPlayer(sock));
 }
 
 void PlayerManager::sendToViewable(CNSocket* sock, void* buf, uint32_t type, size_t size) {

src/TableData.cpp

@@ -117,8 +117,7 @@ void TableData::init() {
                 auto item = _item.value();
                 int typeOverride = getItemType(i); // used for special cases where iEquipLoc doesn't indicate item type
                 ItemManager::ItemData[std::pair<int32_t, int32_t>(item["m_iItemNumber"], typeOverride != -1 ? typeOverride : (int)item["m_iEquipLoc"])]
-                = { item["m_iTradeAble"] == 1, item["m_iSellAble"] == 1, item["m_iItemPrice"], item["m_iItemSellPrice"], item["m_iStackNumber"], i > 9 ? 0 : (int)item["m_iMinReqLev"],
-                i > 9 ? 1 : (int)item["m_iRarity"] };
+                = { item["m_iTradeAble"] == 1, item["m_iSellAble"] == 1, item["m_iItemPrice"], item["m_iItemSellPrice"], item["m_iStackNumber"], i > 9 ? 0 : (int)item["m_iMinReqLev"], i > 9 ? 1 : (int)item["m_iRarity"], i > 9 ? 0 : (int)item["m_iPointRat"], i > 9 ? 0 : (int)item["m_iGroupRat"], i > 9 ? 0 : (int)item["m_iDefenseRat"] };
             }
         }